What are common pitfalls to avoid when using PHP to generate HTML code for image galleries?

One common pitfall to avoid when using PHP to generate HTML code for image galleries is not properly escaping user input, which can lead to security vulnerabilities like cross-site scripting attacks. To prevent this, always use functions like htmlspecialchars() to sanitize user input before outputting it in HTML. 

<?php
// Example of properly escaping user input in PHP for an image gallery
$userInput = "<script>alert('XSS attack!');</script>";
$escapedInput = htmlspecialchars($userInput);
echo "<img src='$escapedInput' alt='User Image'>";
?>

Keywords

PHP HTML code image galleries security vulnerabilities cross-site scripting

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